speed

Noun
  1. Distance travelled per unit time (synset 115307914)
    is a type of: rate - a magnitude or frequency relative to a time unit
    subtypes:
    • angular velocity - (physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute
    • airspeed - the speed of an aircraft relative to the air in which it is flying
    • escape velocity - the minimum velocity needed to escape a gravitational field
    • groundspeed - the speed of an aircraft relative to the ground
    • hypervelocity - excessive velocity
    • muzzle velocity - the velocity of a projectile as it leaves the muzzle of a gun
    • peculiar velocity - velocity with respect to the local standard of rest
    • radial velocity - velocity along the line of sight toward or away from the observer
    • c, light speed, speed of light - the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
    • steerageway - (nautical) the minimum rate of motion needed for a vessel to be maneuvered
    • terminal velocity - the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity
    same as: velocity
  2. A rate (usually rapid) at which something happens (synset 105065291)
    "the project advanced with gratifying speed"
    tells us about:
    • fast - acting or moving or capable of acting or moving quickly
    • slow - not moving quickly; taking a comparatively long time
    is a type of: pace, rate - the relative speed of progress or change
    subtypes:
    same as: fastness, swiftness
  3. Changing location rapidly (synset 100330986)
    is a type of: motion, move, movement - the act of changing location from one place to another
    subtypes:
    same as: hurrying, speeding
  4. The ratio of the focal length to the diameter of a (camera) lens system (synset 113843620)
    is a type of: ratio - the relative magnitudes of two quantities (usually expressed as a quotient)
    same as: f number, focal ratio, stop number
  5. A central nervous system stimulant that increases energy and decreases appetite;
    Used to treat narcolepsy and some forms of depression (synset 102707012)
    is a type of:
    • drug of abuse, street drug - a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction
    • excitant, stimulant, stimulant drug - a drug that temporarily quickens some vital process
    subtypes:
    same as: amphetamine, pep pill, upper
Verb
  1. Move hurridly (synset 202062918)
    "He rushed down the hall to receive his guests"; "The cars raced down the street"
    is a type of: go, locomote, move, travel - change location; move, travel, or proceed, also metaphorically
    subtypes:
    same as: belt along, bucket along, cannonball along, hasten, hie, hotfoot, pelt along, race, rush, rush along, step on it
  2. Move faster (synset 200439133)
    "The car accelerated"
    is a type of: deepen, intensify - become more intense
    subtypes: brisk, brisk up, brisken - become brisk
    same as: accelerate, quicken, speed up
  3. Move very fast (synset 202059573)
    "The runner zipped past us at breakneck speed"
    is a type of: go, locomote, move, travel - change location; move, travel, or proceed, also metaphorically
    subtypes:
    same as: hurry, travel rapidly, zip
  4. Travel at an excessive or illegal velocity (synset 202059899)
    "I got a ticket for speeding"
    is a type of: go, locomote, move, travel - change location; move, travel, or proceed, also metaphorically
  5. Cause to move faster (synset 200440298)
    "He accelerated the car"
    is a type of: alter, change, modify - cause to change; make different; cause a transformation
    same as: accelerate, speed up

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